A. 2x+y+6=0
B. 2x+y-6=0
C. 2x-y+6=0
D. 2x-y-6=0
The condition for f(x)= x3+px2+qx+r(x R) to have no extreme value, is
When a circular oil drop expands on water, its area increases at the uniform rate of 40sq. cm per minute. The rate of increase in the radius when the radius 5 cm is
The two curves x2+y2=25, 2x2-9y+18=0
The minimum value of x3-9x2+24x-12 is
The maximum value of x2-x+1/ x2+x+1 is
If y=x3-ax2+12x+5 is increasing for all real values of x, then a lies between
Two tangents are drawn from the point (-2, -1) to the parabola y2 = 4x. If α is the angle between those tangents then tan α =
The slope of the tangent to the curve x2+y2 =4 at (√2, √2) is
The equation of the normal to the curve y2=x3/2a-x at (a, a) is
The point on the curve x2=2y which is closest to the point (0, 5) is